Wiring a three-prong Navigation switch

[Wellcraft1996]

I have been restoring my Wellcraft excel26 for about a year or more. I recently ran into an issue with my nav/anchor or running lights not working. Checked all fuses and they are good. I don't think the switch has a power source. Its wired with three wires pigtail together on the top pole and one wire on the bottom pole. I'm not that good with electrical wiring so I would appreciate your help.

 

[alldodge]

Withe the switch being a single pole double throw (SPDT) you will need a diode. If switch was replaced with a DPDT it could be wired without using a diode

 

[Wellcraft1996]

It has diode on it, as seen in picture here.

 

[Wellcraft1996]

Withe the switch being a single pole double throw (SPDT) you will need a diode. If switch was replaced with a DPDT it could be wired without using a diode

Replaced diode and lights came on.
Thank you